/* css/style.css — শিক্ষাপ্রতিষ্ঠান ম্যানেজমেন্ট সিস্টেম */
@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #0d9488;
    --primary-hover: #0f766e;
    --primary-light: rgba(13, 148, 136, 0.1);
    --secondary-color: #f0fdfa;
    --accent-color: #f59e0b;
    --sidebar-bg: #0f172a;
    --sidebar-text: #cbd5e1;
    --sidebar-hover: #1e293b;
    --sidebar-active: #0d9488;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.03);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --header-height: 64px;
    --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Hind Siliguri', sans-serif; }

body { background-color: var(--bg-color); color: var(--text-color); font-size: 15px; overflow-x: hidden; }

a { text-decoration: none; color: inherit; }

/* ===================== LAYOUT ===================== */
.wrapper { display: flex; width: 100%; min-height: 100vh; }

/* ===================== SIDEBAR ===================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    transition: var(--transition);
    height: 100vh;
    position: fixed;
    left: 0; top: 0;
    z-index: 1000;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
}

.sidebar.collapsed { width: var(--sidebar-collapsed-width); }

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    background: rgba(0,0,0,0.15);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.sidebar-logo {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo i { font-size: 1.4rem; color: var(--primary-color); }
.sidebar.collapsed .sidebar-logo span { display: none; }

.sidebar-menu { list-style: none; padding: 12px 0; }
.sidebar-menu .menu-label {
    padding: 10px 20px 5px;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #64748b;
    font-weight: 600;
}
.sidebar.collapsed .menu-label { display: none; }

.sidebar-menu li { padding: 2px 10px; }
.sidebar-menu a {
    color: var(--sidebar-text);
    display: flex;
    align-items: center;
    padding: 10px 14px;
    border-radius: 8px;
    transition: var(--transition);
    white-space: nowrap;
    font-size: 0.92rem;
}
.sidebar-menu a:hover { background: var(--sidebar-hover); color: #fff; }
.sidebar-menu a.active { background: var(--sidebar-active); color: #fff; font-weight: 500; }
.sidebar-menu a i { font-size: 1.1rem; min-width: 28px; text-align: center; }
.sidebar.collapsed .sidebar-menu a span { display: none; }

/* ===================== MAIN CONTENT ===================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.sidebar.collapsed ~ .main-content { margin-left: var(--sidebar-collapsed-width); }

/* ===================== HEADER ===================== */
.top-header {
    height: var(--header-height);
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 999;
    border-bottom: 1px solid var(--border-color);
}

.toggle-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
    padding: 8px;
    border-radius: 8px;
}
.toggle-btn:hover { color: var(--primary-color); background: var(--primary-light); }

.header-right { display: flex; align-items: center; gap: 16px; }

.header-inst-name { font-weight: 600; color: var(--primary-color); font-size: 0.95rem; }

.user-profile {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 8px;
    transition: var(--transition);
}
.user-profile:hover { background: var(--bg-color); }
.user-profile img { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; border: 2px solid var(--primary-light); }
.user-profile span { font-size: 0.9rem; font-weight: 500; }

.logout-btn {
    background: none;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
}
.logout-btn:hover { background: var(--danger); color: #fff; }

/* ===================== PAGE CONTENT ===================== */
.page-content { padding: 24px; flex: 1; }

.page-title {
    margin-bottom: 20px;
    color: var(--text-color);
    font-size: 1.4rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-title i { color: var(--primary-color); }

/* ===================== CARDS ===================== */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    border-radius: 0 4px 4px 0;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.stat-card.accent-orange::before { background: var(--accent-color); }
.stat-card.accent-red::before { background: var(--danger); }
.stat-card.accent-blue::before { background: var(--info); }

.stat-info h3 { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 4px; font-weight: 500; }
.stat-info h2 { font-size: 1.6rem; color: var(--text-color); font-weight: 700; }

.stat-icon {
    width: 52px; height: 52px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.card-title i { color: var(--primary-color); }

/* ===================== FORMS ===================== */
.form-group { margin-bottom: 14px; }

.form-label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-color);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 9px 14px;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
    background: #fff;
    color: var(--text-color);
    font-family: 'Hind Siliguri', sans-serif;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

select.form-control { cursor: pointer; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid .full-width { grid-column: 1 / -1; }

@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }

/* ===================== BUTTONS ===================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    font-size: 0.92rem;
    font-weight: 500;
    text-align: center;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Hind Siliguri', sans-serif;
}

.btn-primary { background: var(--primary-color); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }

.btn-secondary { background: #64748b; color: #fff; }
.btn-secondary:hover { background: #475569; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}
.btn-outline:hover { border-color: var(--primary-color); color: var(--primary-color); }

.btn-sm { padding: 5px 10px; font-size: 0.82rem; }
.btn-icon { padding: 6px 10px; }

/* ===================== TABLES ===================== */
.table-responsive { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }
th, td {
    padding: 11px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}
th {
    background: var(--bg-color);
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    white-space: nowrap;
}
tr:hover { background: rgba(13, 148, 136, 0.02); }

/* ===================== BADGES ===================== */
.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    display: inline-block;
}
.badge-active, .badge-success { background: #d1fae5; color: #065f46; }
.badge-inactive, .badge-danger { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-primary { background: var(--primary-light); color: var(--primary-color); }

/* ===================== HEADER ACTIONS ===================== */
.header-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-bar {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
.filter-bar select, .filter-bar input {
    padding: 7px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.88rem;
    font-family: 'Hind Siliguri', sans-serif;
}

/* ===================== MODAL ===================== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}
.modal-overlay.active { display: flex; }

.modal {
    background: var(--card-bg);
    border-radius: 14px;
    padding: 28px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.25s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: translateY(-20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 { font-size: 1.15rem; font-weight: 600; color: var(--primary-color); }

.modal-close {
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}
.modal-close:hover { color: var(--danger); }

/* ===================== TOAST ===================== */
.toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 3000; }

.toast {
    background: var(--card-bg);
    color: var(--text-color);
    padding: 14px 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    transform: translateX(120%);
    transition: transform 0.3s ease;
    border-left: 4px solid var(--success);
    max-width: 380px;
    font-size: 0.9rem;
}
.toast.show { transform: translateX(0); }
.toast.error { border-left-color: var(--danger); }

/* ===================== TABS ===================== */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 20px;
}
.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
    font-family: 'Hind Siliguri', sans-serif;
}
.tab-btn:hover { color: var(--primary-color); }
.tab-btn.active { color: var(--primary-color); border-bottom-color: var(--primary-color); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ===================== EMPTY STATE ===================== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}
.empty-state i { font-size: 3rem; margin-bottom: 12px; display: block; opacity: 0.3; }
.empty-state p { font-size: 0.95rem; }

/* ===================== LOGIN PAGE ===================== */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0d9488 100%);
    padding: 20px;
}

.login-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}

.login-logo {
    text-align: center;
    margin-bottom: 28px;
}
.login-logo i { font-size: 2.5rem; color: var(--primary-color); margin-bottom: 8px; display: block; }
.login-logo h2 { color: var(--text-color); font-size: 1.3rem; }
.login-logo p { color: var(--text-muted); font-size: 0.85rem; margin-top: 4px; }

.login-form .form-control { padding: 12px 16px; font-size: 1rem; }
.login-form .btn { width: 100%; padding: 12px; font-size: 1rem; margin-top: 8px; }

.login-error {
    background: #fee2e2;
    color: #991b1b;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.88rem;
    margin-bottom: 14px;
    display: none;
}

/* ===================== WEBSITE PAGE ===================== */
.website-hero {
    min-height: 70vh;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0d9488 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    padding: 40px 20px;
}
.website-hero h1 { font-size: 2.5rem; font-weight: 700; margin-bottom: 12px; }
.website-hero p { font-size: 1.1rem; color: #cbd5e1; max-width: 600px; margin: 0 auto 24px; }
.website-hero .btn { font-size: 1rem; padding: 12px 28px; background: var(--primary-color); color: #fff; border-radius: 50px; }

.website-nav {
    background: #0f172a;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}
.website-nav .logo { color: #fff; font-size: 1.2rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.website-nav .logo i { color: var(--primary-color); }
.website-nav .nav-links { display: flex; gap: 20px; }
.website-nav .nav-links a { color: #cbd5e1; font-size: 0.9rem; transition: var(--transition); }
.website-nav .nav-links a:hover { color: var(--primary-color); }

.website-section { padding: 60px 24px; max-width: 1100px; margin: 0 auto; }
.website-section h2 { font-size: 1.8rem; text-align: center; margin-bottom: 36px; color: var(--text-color); }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.feature-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-card i { font-size: 2.2rem; color: var(--primary-color); margin-bottom: 14px; display: block; }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-muted); font-size: 0.88rem; }

.website-footer {
    background: #0f172a;
    color: #94a3b8;
    text-align: center;
    padding: 24px;
    font-size: 0.85rem;
}

/* ===================== RESPONSIVE ===================== */
@media screen and (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.mobile-open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .sidebar.collapsed ~ .main-content { margin-left: 0; }
    .grid-cards { grid-template-columns: 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .header-actions { flex-direction: column; align-items: stretch; }
    .website-hero h1 { font-size: 1.8rem; }
}